Baretti: A dictionary of the English and Italian languages
Bóll-a, s. f. dim. Bóll-icélla, Bóll-iciáttola, Bóll-icína, Bóll-icola, aug. Bóll-óna, disp. Bóll-áccia,
1. bubble 2. bubblingof a liquid which boils; 3. a blister, carbuncle, plague sore, bubo. — acquajuola, a blister full of water; 4. seal, impression of a seal; 5. the pope's bull.
Florio: a worlde of wordes, or most copious, dictionarie in Italian and English
bolla: a round viale of glasse. Also a marking or branding iron, a seale, a stamp, a bulle, a print. Also a blister, a wheale, a push, a bladder, a bubble. Also a stud, a bosse or any great round headed naile.